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1. I                                   /We
2. You                             /You
3. He/She/It                    They.
4. I am a boy.                 I am a girl.
5. We are boys.              We are girls.
6. You are my friend.    You are my friends.
7. He is my brother,
8. She is my sister.
9. It is my pet.
10. They are my friends.
11. They are apples.
12. Are you a boy? yes,I am. No,I am not.
13. Are you a good girl? yes, I am
14. Are we your friends? yes.yes you are
15. Am I your friend? yes.Yes,you are.
16. Is he your brother? yes,he is.No, he isn't.
17. Is she your sister? Yes, she is.No,She isn't
18. Is it your pet? yes,it is. No,it isn't.
19. Are they apples? Yes.Yes they are. No.They aren't.
20. http://www.thefreedictionary.com/